Process of mercerizing.



UNITED STATES PATENT OFFICE.

PAUL DOSNE, OF AeLIE, ITALY.

PROCESS OF MERCERIZ ING.

SPECIFICATION forming part of Letters Patent No. 629,780, dated August1, 1899.

Application filed Febrnary 16, 1897. Renewed June 3,1899. Serial No.719,303. on specimens.) c.

To all whont it may concern:

Be it known that 1, PAUL DOSNE, a citizen of the Republic of France,residing at Agli, Italy, have invented a certain new and useful Processof Treating Cotton and Similar Goods to Produce the Appearance of Silk,of which the following is a full and complete specification, such aswill enable those skilled in the art to which it appertains to make anduse the same.

This invention relates to a process for producing the moire efiect ongoods from a vegetable fiber, such as cotton cloth, whereby theappearance of silk is given to ordinary cotton cloth.

To carry out my improved process, it is necessary to operate on calicoor similar material which has been printed in a series of parallelstripes of the same or various colors, which are formed quite closetogether. The moir efiect shows to the best advantage when the width ofthe stripes averages about three to six warp-threads. The cloth is thenprinted with white or colored resists consisting, preferably, ofgum-arabic alone or in conjunction with substantial dyestuffs, thestripes of the resist being substantially the same width as the coloredstripes. While the cloth is being passed through the printing-rolls forprinting the resists it is subjected to distortion or pulled to rightand left, thus producing an irregular print or interruption or break inthe continuity of the resiststripes, which gives the moir effect. Themoir effect can be varied by increasing or diminishing the nu mber ofpulls to the right and left to which the cloth is subjected. The moireeffect is prod need by the contraction or drawing together of themercerized stripes, which causes the 7 grooved cross-rails in order toproduce small folds, which make a pleasing effect. The mechanical resultof the sodabath tends to heighten the moir effect. Threads when viewedsingly do not show any special peculiar luster; but when examining thecloth crosswise to the warp an irregular moir efiect with the originalplay of color is apparent.

Having fully described my invention, I claim as new and desire to secureby Letters Patent The process for producing moire effects on stripedwoven fabrics, consisting in applying the stripes of a resist to saidfabric, distortin g or pulling the fabric from right to left and left toright alternately as the resist is being applied and then subjecting thefabric to mercerization, substantially as described.

In testimony whereof I have hereunto snbscribed my hand in presence ofthe two subsoribiu g witnesses.

Gusravo SCl-IEIDEOKER, PR-OLA Gursnrrn.

